Which of the following is the author's opinion about the woman at the Global Support Centre？
A. She sounded helpful and knowledgeable.
B. She was there to make callers frustrated.
C. She was able to solve her computer problem.
D. She was quick to pass her along to a technician.
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______ as "the census taker of the sky", Annie Jump Cannon contributed considerably to the
A. Known
B. Knowing
C. To know
D. Knowledge
Helen was much kinder to her youngest child than she was to the others, ______, of course,
A. who
B. that
C. what
D. which
Why Chang' aa is popular in poor areas？
A. It is very cheap.
B. It can make people highly dizzy.
C. It provides way for poor people to escape from the misery of slum living.
D. People who sell it can get great profit.
任何一笔经济业务，无论是否涉及明细分类账户，都应该进行平行登记。()
A. 正确
B. 错误
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